Pulp-grinder.



sg R. WAGG.

PULP GRINDER.4 APLIOATION FILED JAN. 9, 1906.

938,608. ravnteasept. 7, 1909.

2 SHEETS-SHEET 1.

To all whom 'it may concern:

nnrrnn 'sTATns entranti? oFFIoE.

sommen nwAGG, or APPLETON, WISCONSIN.v

PULP-GRINDER.

Be it known thatI, SOLOMON R. WAGG, a citizen ofthe United States, residing at- Ap pleton, in the county of Outagamie and State o'f'Wlsconsin, have invented new and vuseful Improvements in Bulp-Grinders, of which the following is a specification.

This invention relates to pulp grinders, and has for its main object to provide a'pulp grinder composed ofhs'gments of artificial or other stone which sh besecurely locked to a central spider or core in 'such manner as to practically prevent the ossibility of the segments, or any of them, eing thrown olf by centrifu al action. A

It is wellImown. that pulp-grinders, grindstones, or the like, which are made from a single block of stone, will frequently burst when revolved at a high rate of speed, kil-ling or naiming the attendant and wrecking the machinery. Where the grinder is composed of segments or blocks of stone secured about a rin or core, the above danger will be minimize but not e'ntirelyobviated, as, sc 'far-q as I am aware, no means have been provided heretofore, for securing -segments of stone position about a central spideror core 1n such manner 'as to practically prevent the ossibility of the segments being thrown off. y the use of my invention, the element of danger Yfrom the' ra id 'rotation' of the grinder will bel minimized to such an extent as to be ractically negligible. l

A furt er object of the invention is to provide a pulp grinder in'which the segments shall present a novel character of grinding surface asregardsthe composition of individual segments and the relation of the segnents to each other with respect tothe gra e o Grit.

he invention is illustrated in the accom-- panying drawing, in which:

Figure l is a lview in side'elevatio'n of a pulp inder or grindstone, a part of one of the camping plates being broken away to better illustrate the construction; Fig. 2 is a view in front elevationo the same' Fig. 3

is a transverse sectional view on the lme 2-2 tated from any suitable source of power, not

shown, and on which is mounted a spider or core, comprising a hub 2, spokes"3,r1m 4, and

lSx'iecfwation of Letters Patent. l 'Patented Sept. 7, 1909. `Application mea 'January e, 190e. serial no. 295,261. l

-segments,'as shown, is adapted to be seated between two of the ribs 5 and to this end their under sides are provided with a re-` duced portion 7 to lit snugl between the two projections A 5 and shoul ered ortions 8 which extend half way over the rlbs between which the segment is located. In this way -the sides of Aadjacent segments may be brought into contact. The opposite ends of each of the stone segments 6 is cutaway in its upper portion to provide a curved shoulder 9 which, when all the segments are placed about the spider or core, will form a circular shoulder, as will be understood, and on each of these circular shoulders I place a metal ring 10, which* rings constitute one of the means Imploy for preventing the segments .being thrown `ott by centrifugal force. "The second means I employ for this purpose consists of flanged clamp plates 11 which are applied to opposite sides of the stone4 and are provided withannular in-turned flanges 12 which are adapted to extend over, and embrace snugly the rings 10. The said rings 10 of themselves constitute a very secure loclringmeans forthe stone segments, but, as it frequently happensthat a given piece of'metal willv be weak in some point, I further strengthen the structure and guard against any danger resulting :trom weakness inthe rings 10 by employingy the clamp plates 11 in the manner described. These clamp rmly against the sides o the stone segments and at the same time xedly secured .to the axle or shaft 1 by means of lock nuts 13. The third means employed forv locking the stone segments to the spider or core conasists in providing interdental 'apertures 14, 15, one or more (1n each stone segment, the larger aperture 14 opening at the periphery of the segments, and the smaller aperture 15 continuing through the bottom.

The rim 4 is provided with apertures alining with those formedin the segments and core I insert a bolt 16 in the apertures of 'so d lates are heldv yafter the segments have been applied to the Cri ' brimstone into the various apertures which may be left in building up the same. l

vto drill these holes after the segments have 4tive movement between the parts-I provide of the segmeiitshave been placed in position another, or should there be any slight un` the inside of the rim. After the bolts have been secured, the 'apertures 14 are filled up flush with the surface of the segments by pouring therein melted briinstone or other similar substance which Will harden after being allowed` to set. l

In order to hold the clamp plates 11 at their peripheries infirm contact with the Sides of the segments 6, as well as to furnish an additional means .for holding the stones to the core, I extend through Athe clamp plates and segments at suitable intervals around the grinder, bolts 19, which, when nuts are applied thereto in the ordinary manner, will cause the clamp plates 11 to be drawn firmly against the sides of the stone -segments and also 'will operate to securely connect the plates to the segments so as to prevent any relative movement between these parts. The holes in the segments for receiving the bolts 19 are made therein before the segments are burned, as carborundum be-V ing, as is known, extremely hard, it would be impracticable, if not practically impossible,

been burned.

It is desirable that the grinder as a whole shall operate as a solid integral structure, and to this endthat is, lto prevent any rela-v apertures QO in the flanges 1i)J of the clamp plates at suitable points about the peripheries of the clamp plates, into which apertures I' pour melted briinstone which fills the inter-v stiees between the stone segments and the parts vengaging the same. For the same reason each of the bolts 19, as shown in Fig. 5, is hollow and provided throughout its length with aseries of apertures 21, and after all and the nuts applied to the bolts 19, I pour melted brimstone into these bolts which escapes through the apertures 21 and lls up any space between the bolts and the walls of the apertures through which they pass. Before pouring the melted brimstone into these bolts and through the apertures 20, the grinder as a whole may be heated to the required degree to facilitate the flow ofthe As shown by F ig. 2, the meeting lines of the various segments extend diagonally across the face of the grinder or at an'angle to the. axis thereof, as indicated at 22, so that should one segment wear away more than' evenness at the meeting edges of the segments, the inclined edges will give a shear degrees of coarsei'iess.

uniformity and smoothness of surface, byv

combining fibers of different lengths. To this end l contemplate making the segments of varying grades of grit, that is to say,

beginning with agiven segment of relatively coarse grit, the succeeding segments around the entire grinder will be of successively less detach from the wood fibers of substantially uniform sizcyand as the size of these fibers will vary vin accordance with the grade of grit ofthe segment, it follows that in each cycle of movement of the grinder a series of fibers of varying lengths will be detached from the wood and mixed together, and, as stated above, the paper produced from this mixture of fibers of various lengths will be much superior to paper produced from fibers of a uniform length. Furthermore, in the case of segments of the coarser grits, I contemplate having such segments composed of materials of different grits so that the interstiees which occur between the projections in the eoarser stones willl be in a measure filled up,\.as it were. This course is adopted for the Qreason `that I ind.tlia't where coarse stones are employed they have a tendency to tear the fibers, and by having two, three or more grits combined in a single stone this tendency is, to a large extent, overcome. In the case of the finer stones, however, the seg,- ments .may have a uniform grit throughout. Under any circumstances, however, I Wish it understood that while a given segment may be composed of two, three oi' more grades of grit, the average grade of grit of the succeeding segments will increase or diminish, as the case. may be.

It will be apparent to those skilled in the art that the emplo'ymei'it of rings engaging annular shoulders on opposite sides of the grindstone is `not confined to eases in which the grindstone is made up of segments, but that such shoulders may equally well be formed onopposite sides of a solid stone and the rings be applied to such shoulders. The same is true with respect to the clamp plates 11. I also contemplate employing the rings 10 without the clamp plates 11, or the clamp plates 11. without the rings 10 (which latter construction is shown in4 Fig. 4f), either on a solid grindstone or one made up of segii'ients as herein illustrated.

1. A circular pulp grinder composed of a .series of stone segments, the meeting edges As each segment willI scribed. 4

3. A' pulp grinder comprising a spider having a cylindrical rim provided with boltholes, stone segments applied to said rim to form a circular grinding member, each of said segments having a shouldered aperture, a headed b olt inserted in each aperture'and passed through one of the boltholes of said rim, a nut applied tc'ethe inner end'of said bolt for binding the segment to the rim, and a filling inserted in said aperture above the head of said. bolt.

et. A pulp grinder composedy of al series of stone segments' and provided on opposite" sides with an annular shoulder, clam plates secured to opposite sides of sai grinder, hollow apertured bolts extending through said clamp-plates and said;Y segments, and a self-hardening material filling said bolts and the spaces surrounding the same.

5. A pulp grinder composed of a series of stone segments each of said/.segments being made up of a plurality of grits of dilerent grades ot' coarseness, the average grade of courseness of 'each segment being greater or less than that of the adjacent se ent.

6. A pulp grinder composed o a series of stone segments the grade of eoarseness of each of which is greater or less than that of the segment adjacent thereto.

7. A circular pulp grinder composed of stone and havin on opposite sides an an- 'nular shoulder, c amp plates secured to opposite sides of said grinder and having annular-flange members adapted to cooperate with said shoulders, hollow apertured bolts extending through said clamp plates and stone, and a self-hardening material jlling said bolts and the spaces `surrounding the same. f,

8. A pulp grinder composed of a series of stone segments, euchof which ismade up of a plurality of grits of diierent grades of eoarseness, the average grade of coarsencss ot' each segment being greater or less than that of the adjacent segment, clamp plates engaging the` segments, hollow aperturml bolts extending through the segments and clamp plates.v and a self-hardening material filling said bolts and the spaces surrounding the same.

. 9; A pulp grinder composed of a stone body portion `provided with annular shoulders, annular clamping means cooperating with the shoulders, and a self-hardening ll-l ing material associatedwith the clamping vmeans and shoulders toillthe, intersties thereot i 10.A A pulp grinder composed Jofa stone a body portion provided with annular shoulders and clamping lates having means inelosing said shoul ers, combined with a brimstonefilling between the shoulders and the means whereby the plates and body portion are rigidly connectedtogether.

11. A.A .pulp grinder comprising a stone body ortlon, a rotatable element and clamp-V ing plJates for connecting the body portion to the rotatable element, combined with a brimstone filling-between the plates and the body portion'.` for rigidlyconnecting the parts together.

12. A. pulp grinder comprising a shoultiered stonefziody. portion, a rotatable element, a clamping. means connected `with the `rotatable element and engaging the body portion andal brimstone filling for theinterstiees between the clamping means, the body portion and the shouldered part of the body 'portion vwhereby the said arts are rigidly connected together, said rimstone filling covering theshouldered part of the body portion.. I

13. A pulp grinder vcomprisin a spider having a cylindrical 'rim rovidewith bolt holes, stone-segments-app iedtosaid rim to' form a circular .said segments having a shouldered' aperture, a headed bolt inserted 'in each aperture and 'passed through one of thev bolt holes of said run, a nutffa plied to theinner end of said bolt for ,bin ing the 'segment to the rim, a filling inserted in said aperture above the head of said bolt, clamp plates for the segments, hollow apertured bolts extending throu h said clamp plates and segments, and itself-hardening material illing said bolts and the spaces surrounding the` same. 14. A pulp grinder composed of av series ofstone segments, the grade of coarseness 'of each of which is greater or less than that of the segment adjacent thereto, a spider, lbolts, extending' radially through the segments and secured to the spider, a filling in each of the segments for inclosing its respective bolt, clamp plates engaging the sides ofthe segments, and bolts'extending through the clamp plates and segments. i

l5. A circular pulp grinder comprising a Spider, a body portion composed of stone abutting againstvl said spider and provided on opposite sides with an annular shoulder, rings mounted on said shoulders,and circular clamp plates secured to opposite sides of said spider and body portion and having annular flange members engaging over said inding member, each of rings, said grinder having the interstices betweenv the body portion and the rings and the clamp plates supplied Wit-h a self-hardening material.

16. AA pulp grinder comprising a segmental stone body having annular side shoulders, rings' surrounding Jche side shoulders and clamping plates at the sides-of the body ,-vendyhavng 'means for engagementwth the itffnfsone segments, clamping-platense@ A'eaolx side thereof" and means connecting. Y plates and the segments and consisting of s sois means for coperation With the shoulder and brimstone filling means interposed between the `clamping means and the shoulder.

In testimony whereof I have hereunto set my hand inpresence of two subscribing Wit- SOLOMON R. WAGG.

-Witnesseszi AI. N.. STEWART,

ORLANDO E. CLARK. 

